class Queue[T <: Data] extends Module

A hardware module implementing a Queue

Source
Decoupled.scala
Example:
  1. val q = Module(new Queue(UInt(), 16))
    q.io.enq <> producer.io.out
    consumer.io.in <> q.io.deq
Type Hierarchy
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. Queue
  2. Module
  3. ImplicitReset
  4. ImplicitClock
  5. RawModule
  6. BaseModule
  7. IsInstantiable
  8. HasId
  9. InstanceId
  10. AnyRef
  11. Any
Implicitly
  1. by BaseModuleExtensions
  2. by IsInstantiableExtensions
  3. by any2stringadd
  4. by StringFormat
  5. by Ensuring
  6. by ArrowAssoc
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new Queue(gen: T, entries: Int, pipe: Boolean = false, flow: Boolean = false, useSyncReadMem: Boolean = false, hasFlush: Boolean = false)

    gen

    The type of data to queue

    entries

    The max number of entries in the queue

    pipe

    True if a single entry queue can run at full throughput (like a pipeline). The ready signals are combinationally coupled.

    flow

    True if the inputs can be consumed on the same cycle (the inputs "flow" through the queue immediately). The valid signals are coupled.

    useSyncReadMem

    True uses SyncReadMem instead of Mem as an internal memory element.

    hasFlush

    True if generated queue requires a flush feature

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from Queue[T] toany2stringadd[Queue[T]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (Queue[T], B)
    Implicit
    This member is added by an implicit conversion from Queue[T] toArrowAssoc[Queue[T]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  6. def IO[T <: Data](iodef: => T)(implicit sourceInfo: SourceInfo): T

    This must wrap the datatype used to set the io field of any Module.

    This must wrap the datatype used to set the io field of any Module. i.e. All concrete modules must have defined io in this form: [lazy] val io[: io type] = IO(...[: io type])

    Items in [] are optional.

    The granted iodef must be a chisel type and not be bound to hardware.

    Also registers an Data as a port, also performing bindings. Cannot be called once ports are requested (so that all calls to ports will return the same information). Internal API.

    TODO(twigg): Specifically walk the Data definition to call out which nodes are problematic.

    Attributes
    protected
    Definition Classes
    BaseModule
  7. def _bindIoInPlace(iodef: Data)(implicit sourceInfo: SourceInfo): Unit

    Chisel2 code didn't require the IO(...) wrapper and would assign a Chisel type directly to io, then do operations on it.

    Chisel2 code didn't require the IO(...) wrapper and would assign a Chisel type directly to io, then do operations on it. This binds a Chisel type in-place (mutably) as an IO.

    Attributes
    protected
    Definition Classes
    BaseModule
  8. var _closed: Boolean
    Attributes
    protected
    Definition Classes
    BaseModule
  9. def _moduleDefinitionIdentifierProposal: String
    Attributes
    protected
    Definition Classes
    BaseModule
  10. def _sourceInfo: SourceInfo
    Attributes
    protected
    Definition Classes
    BaseModule
  11. def _traitModuleDefinitionIdentifierProposal: Option[String]
    Attributes
    protected
    Definition Classes
    BaseModule
  12. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  13. def atModuleBodyEnd(gen: => Unit): Unit

    Hook to invoke hardware generators after the rest of the Module is constructed.

    Hook to invoke hardware generators after the rest of the Module is constructed.

    This is a power-user API, and should not normally be needed.

    In rare cases, it is necessary to run hardware generators at a late stage, but still within the scope of the Module. In these situations, atModuleBodyEnd may be used to register such generators. For example:

    class Example extends RawModule {
      atModuleBodyEnd {
        val extraPort0 = IO(Output(Bool()))
        extraPort0 := 0.B
      }
    }

    Any generators registered with atModuleBodyEnd are the last code to execute when the Module is constructed. The execution order is:

    • The constructors of any super classes or traits the Module extends
    • The constructor of the Module itself
    • The atModuleBodyEnd generators

    The atModuleBodyEnd generators execute in the lexical order they appear in the Module constructor.

    For example:

    trait Parent {
      // Executes first.
      val foo = ...
    }
    
    class Example extends Parent {
      // Executes second.
      val bar = ...
    
      atModuleBodyEnd {
        // Executes fourth.
        val qux = ...
      }
    
      atModuleBodyEnd {
        // Executes fifth.
        val quux = ...
      }
    
      // Executes third..
      val baz = ...
    }

    If atModuleBodyEnd is used in a Definition, any generated hardware will be included in the Definition. However, it is currently not possible to annotate any val within atModuleBodyEnd as @public.

    Attributes
    protected
    Definition Classes
    RawModule
  14. def circuitName: String
    Definition Classes
    HasId
  15. final val clock: Clock
    Definition Classes
    Module
  16. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  17. final val definitionIdentifier: String

    Represents an eagerly-determined unique and descriptive identifier for this module

    Represents an eagerly-determined unique and descriptive identifier for this module

    Definition Classes
    BaseModule
  18. val deq_ptr: Counter
  19. def desiredName: String

    Give this Queue a default, stable desired name using the supplied Data generator's typeName

    Give this Queue a default, stable desired name using the supplied Data generator's typeName

    Definition Classes
    QueueBaseModule
  20. val do_deq: Bool
  21. val do_enq: Bool
  22. val empty: Bool
  23. def endIOCreation()(implicit si: SourceInfo): Unit

    Disallow any more IO creation for this module.

    Disallow any more IO creation for this module.

    Definition Classes
    BaseModule
  24. val enq_ptr: Counter
  25. def ensuring(cond: (Queue[T]) => Boolean, msg: => Any): Queue[T]
    Implicit
    This member is added by an implicit conversion from Queue[T] toEnsuring[Queue[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  26. def ensuring(cond: (Queue[T]) => Boolean): Queue[T]
    Implicit
    This member is added by an implicit conversion from Queue[T] toEnsuring[Queue[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  27. def ensuring(cond: Boolean, msg: => Any): Queue[T]
    Implicit
    This member is added by an implicit conversion from Queue[T] toEnsuring[Queue[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  28. def ensuring(cond: Boolean): Queue[T]
    Implicit
    This member is added by an implicit conversion from Queue[T] toEnsuring[Queue[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  29. val entries: Int
  30. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  31. def equals(that: Any): Boolean
    Definition Classes
    HasId → AnyRef → Any
  32. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  33. val flow: Boolean
  34. val flush: Bool
  35. val full: Bool
  36. val gen: T
  37. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  38. def getCommands: Seq[Command]
    Attributes
    protected
    Definition Classes
    RawModule
  39. def getModulePorts: Seq[Data]
    Attributes
    protected[chisel3]
    Definition Classes
    BaseModule
  40. val hasFlush: Boolean
  41. def hasSeed: Boolean

    returns

    Whether either autoName or suggestName has been called

    Definition Classes
    HasId
  42. def hashCode(): Int
    Definition Classes
    HasId → AnyRef → Any
  43. def implicitClock: Clock

    Method that should point to the user-defined Clock

    Method that should point to the user-defined Clock

    Attributes
    protected
    Definition Classes
    ModuleImplicitClock
  44. def implicitReset: Reset

    Method that should point to the user-defined Reset

    Method that should point to the user-defined Reset

    Attributes
    protected
    Definition Classes
    ModuleImplicitReset
  45. def instanceName: String

    Signal name (for simulation).

    Signal name (for simulation).

    Definition Classes
    BaseModule → HasId → InstanceId
  46. val io: QueueIO[T]
  47. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  48. val maybe_full: Bool
  49. final lazy val name: String

    Legalized name of this module.

    Legalized name of this module.

    Definition Classes
    BaseModule
  50. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  51. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  52. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  53. def parentModName: String
    Definition Classes
    HasId → InstanceId
  54. def parentPathName: String
    Definition Classes
    HasId → InstanceId
  55. def pathName: String
    Definition Classes
    HasId → InstanceId
  56. val pipe: Boolean
  57. def portsContains(elem: Data): Boolean
    Attributes
    protected
    Definition Classes
    BaseModule
  58. def portsSize: Int
    Attributes
    protected
    Definition Classes
    BaseModule
  59. val ptr_diff: UInt
  60. val ptr_match: Bool
  61. val ram: MemBase[T]
  62. final val reset: Reset
    Definition Classes
    Module
  63. def resetType: Type

    Override this to explicitly set the type of reset you want on this module , before any reset inference

    Override this to explicitly set the type of reset you want on this module , before any reset inference

    Definition Classes
    Module
  64. def suggestName(seed: => String): Queue.this.type

    Takes the first seed suggested.

    Takes the first seed suggested. Multiple calls to this function will be ignored. If the final computed name conflicts with another name, it may get uniquified by appending a digit at the end.

    Is a higher priority than autoSeed, in that regardless of whether autoSeed was called, suggestName will always take precedence.

    seed

    The seed for the name of this component

    returns

    this object

    Definition Classes
    HasId
  65. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  66. final def toAbsoluteTarget: IsModule

    Returns a FIRRTL ModuleTarget that references this object

    Returns a FIRRTL ModuleTarget that references this object

    Definition Classes
    BaseModuleInstanceId
    Note

    Should not be called until circuit elaboration is complete

  67. def toDefinition: Definition[Queue[T]]
    Implicit
    This member is added by an implicit conversion from Queue[T] toBaseModuleExtensions[Queue[T]] performed by method BaseModuleExtensions in chisel3.experimental.BaseModule.
    Definition Classes
    BaseModuleExtensions
  68. final def toNamed: ModuleName

    Returns a FIRRTL ModuleName that references this object

    Returns a FIRRTL ModuleName that references this object

    Definition Classes
    BaseModuleInstanceId
    Note

    Should not be called until circuit elaboration is complete

  69. final def toRelativeTarget(root: Option[BaseModule]): IsModule

    Returns a FIRRTL ModuleTarget that references this object, relative to an optional root.

    Returns a FIRRTL ModuleTarget that references this object, relative to an optional root.

    If root is defined, the target is a hierarchical path starting from root.

    If root is not defined, the target is a hierarchical path equivalent to toAbsoluteTarget.

    Definition Classes
    BaseModule
    Note

    If root is defined, and has not finished elaboration, this must be called within atModuleBodyEnd.

    ,

    The BaseModule must be a descendant of root, if it is defined.

    ,

    This doesn't have special handling for Views.

  70. def toString(): String
    Definition Classes
    AnyRef → Any
  71. final def toTarget: ModuleTarget

    Returns a FIRRTL ModuleTarget that references this object

    Returns a FIRRTL ModuleTarget that references this object

    Definition Classes
    BaseModuleInstanceId
    Note

    Should not be called until circuit elaboration is complete

  72. val useSyncReadMem: Boolean
  73. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  74. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  75. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Shadowed Implicit Value Members

  1. def toInstance: Instance[Queue[T]]
    Implicit
    This member is added by an implicit conversion from Queue[T] toBaseModuleExtensions[Queue[T]] performed by method BaseModuleExtensions in chisel3.experimental.BaseModule.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (queue: BaseModuleExtensions[Queue[T]]).toInstance
    Definition Classes
    BaseModuleExtensions
  2. def toInstance: Instance[Queue[T]]
    Implicit
    This member is added by an implicit conversion from Queue[T] toIsInstantiableExtensions[Queue[T]] performed by method IsInstantiableExtensions in chisel3.experimental.hierarchy.core.IsInstantiable.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (queue: IsInstantiableExtensions[Queue[T]]).toInstance
    Definition Classes
    IsInstantiableExtensions

Deprecated Value Members

  1. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from Queue[T] toStringFormat[Queue[T]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @deprecated @inline()
    Deprecated

    (Since version 2.12.16) Use formatString.format(value) instead of value.formatted(formatString), or use the f"" string interpolator. In Java 15 and later, formatted resolves to the new method in String which has reversed parameters.

  2. def override_clock: Option[Clock]
    Attributes
    protected
    Definition Classes
    Module
    Annotations
    @deprecated
    Deprecated

    (Since version Chisel 3.5) Use withClock at Module instantiation

  3. def override_clock_=(rhs: Option[Clock]): Unit
    Attributes
    protected
    Definition Classes
    Module
    Annotations
    @deprecated
    Deprecated

    (Since version Chisel 3.5) Use withClock at Module instantiation

  4. def override_reset: Option[Bool]
    Attributes
    protected
    Definition Classes
    Module
    Annotations
    @deprecated
    Deprecated

    (Since version Chisel 3.5) Use withClock at Module instantiation

  5. def override_reset_=(rhs: Option[Bool]): Unit
    Attributes
    protected
    Definition Classes
    Module
    Annotations
    @deprecated
    Deprecated

    (Since version Chisel 3.5) Use withClock at Module instantiation

  6. def [B](y: B): (Queue[T], B)
    Implicit
    This member is added by an implicit conversion from Queue[T] toArrowAssoc[Queue[T]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use -> instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

Inherited from Module

Inherited from ImplicitReset

Inherited from ImplicitClock

Inherited from RawModule

Inherited from BaseModule

Inherited from IsInstantiable

Inherited from HasId

Inherited from InstanceId

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion BaseModuleExtensions fromQueue[T] to BaseModuleExtensions[Queue[T]]

Inherited by implicit conversion IsInstantiableExtensions fromQueue[T] to IsInstantiableExtensions[Queue[T]]

Inherited by implicit conversion any2stringadd fromQueue[T] to any2stringadd[Queue[T]]

Inherited by implicit conversion StringFormat fromQueue[T] to StringFormat[Queue[T]]

Inherited by implicit conversion Ensuring fromQueue[T] to Ensuring[Queue[T]]

Inherited by implicit conversion ArrowAssoc fromQueue[T] to ArrowAssoc[Queue[T]]

Ungrouped